State Route 580 over Bellam Boulevard
GoodMarin County, California · 04-MRN-580-4.50-SRF · Structure no. 27 0073R
- Built
- 2010
- 15 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 119 ft
- 1 main span
- Daily traffic
- 67,000
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 580 over Bellam Boulevard is a prestressed concrete stringer/multi-beam or girder carrying State Route 580 over Bellam Boulevard in Marin County, California. It was built in 2010, so it is 15 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 67,000 vehicles a day, roughly 7% of them trucks, projected to reach 85,000 by 2045. The structure is 119 ft (36.4 m) long and 42 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 580 over Bellam Boulevard built?
It was built in 2010, making it 15 years old in 2025.
What condition is State Route 580 over Bellam Boulevard in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does State Route 580 over Bellam Boulevard carry?
About 67,000 vehicles per day (2021 count), of which roughly 7% are trucks.
How long is State Route 580 over Bellam Boulevard?
The structure is 119 ft (36.4 m) long with a longest span of 118 ft (36.1 m) and a deck 42 ft wide.
Who owns State Route 580 over Bellam Boulevard?
It is owned by the State Highway Agency.